PAASTA-18198: add pool_node_affinities to improve Karpenter AZ balance #3849
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Signed-off-by: Max Falk <gfalk@yelp.com>
Signed-off-by: Max Falk <gfalk@yelp.com>
gmdfalk
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gmdfalk
changed the title
Signed-off-by: Max Falk <gfalk@yelp.com>
Signed-off-by: Max Falk <gfalk@yelp.com>
nemacysts
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May 2, 2024
ilkinmammadzada
approved these changes
May 2, 2024
Signed-off-by: Max Falk <gfalk@yelp.com>
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This adds a new system config option,
pool_node_affinities.It's necessary to configure pods with a preselection of preferred 2-3 AZs per pool so that Karpenter does not try to consider all 6+ AZs in a region for scheduling decisions.
This option is a temporary solution and the proper fix will likely be to adopt something like the descheduler to achieve a better AZ balance (along with other benefits).
Signed-off-by: Max Falk gfalk@yelp.com